Application of
NAA and BA for improving the yield along with flavonoid and polyphenol content of
Eleutherine bulbosa bulb
Tran Thi Thanh Hien
Res. J. Biotech.; Vol. 20(5); 55-60;
doi: https://doi.org/10.25303/205rjbt55060; (2025)
Abstract
Eleutherine bulbosa (Mill.) urb. is a herbaceous bulbous plant, known for its high
medicinal value. To improve bulb yield and quality, controlling bulb growth as well
as flavononoid and polyphenol content by NAA and BA was the objective of this study.
Apply NAA and BA separately at different concentrations (BA: 5 ppm, 10 ppm and 15
ppm; NAA: 5 ppm, 10 ppm and 15 ppm) on E.bulosa at 6 weeks of age. After 4 weeks
of treatment, tuber diameter, fresh weight, dry weight, number of leaf sheaths,
total sugar content, starch, polyphenol and flavonoid in bulb were determined. Then,
combined treatment with NAA 10 ppm and BA 10 ppm (at weeks 6 and 10), after 6 weeks
of treatment, bulb fresh weight, dry weight, flavonoid and polyphenol content and
bulb yield per plant were determined. The results showed that the 10 ppm BA treatment
had the highest bulb diameter, fresh weight, dry weight, polyphenol content compared
to other treatments and controls, while the 10 ppm NAA treatment had the highest
flavonoid content but dry weight and bulb diameter were lower than the 10 ppm BA
treatment.
In all the treatments, the number of leaf sheaths was not different from that of
the control. In the combined treatments, bulb fresh weight, dry weight and polyphenol
content and bulb yield per pot were significantly increased in the BA (w6) + BA
(w10) treatment, slightly increased compared to the control and lower than other
treatments. In the treatment of NAA (w6) + NAA (w10), it had a high flavonoid content
but the lowest polyphenol content compared to other treatments. The relationship
between sugar, starch, polyphenol and flavonoid content is also discussed.
